WindowUtil.java

package me.mrrobot97.netspeed;

import android.content.Context;
import android.graphics.PixelFormat;
import android.net.TrafficStats;
import android.os.Handler;
import android.os.Message;
import android.view.Gravity;
import android.view.View;
import android.view.WindowManager;

import java.text.NumberFormat;

/**
 * Created by mrrobot on 16/12/28.
 */

public class WindowUtil {
    public static int statusBarHeight=0;
    //记录悬浮窗的位置
    public static int initX,initY;
    private WindowManager windowManager;
    public SpeedView speedView;
    private WindowManager.LayoutParams params;
    private Context context;

    public boolean isShowing() {
        return isShowing;
    }

    public static boolean isShowing=false;

    public static final int INTERVAL=2000;
    private long preRxBytes,preSeBytes;
    private long rxBytes,seBytes;
    private Handler handler=new Handler(){
        @Override
        public void dispatchMessage(Message msg) {
            super.dispatchMessage(msg);
            calculateNetSpeed();
            sendEmptyMessageDelayed(0,INTERVAL);
        }
    };

    public void onSettingChanged(){
        String setting= (String) SharedPreferencesUtils.getFromSpfs(context,MainActivity.SETTING,MainActivity.BOTH);
        if(setting.equals(MainActivity.BOTH)){
            speedView.upText.setVisibility(View.VISIBLE);
            speedView.downText.setVisibility(View.VISIBLE);
        }else if(setting.equals(MainActivity.UP)){
            speedView.upText.setVisibility(View.VISIBLE);
            speedView.downText.setVisibility(View.GONE);
        }else{
            speedView.upText.setVisibility(View.GONE);
            speedView.downText.setVisibility(View.VISIBLE);
        }
    }

    private void calculateNetSpeed() {
        rxBytes=TrafficStats.getTotalRxBytes();
        seBytes=TrafficStats.getTotalTxBytes()-rxBytes;
        double downloadSpeed=(rxBytes-preRxBytes)/2;
        double uploadSpeed=(seBytes-preSeBytes)/2;
        preRxBytes=rxBytes;
        preSeBytes=seBytes;
        //根据范围决定显示单位
        String upSpeed=null;
        String downSpeed=null;

        NumberFormat df= java.text.NumberFormat.getNumberInstance();
        df.setMaximumFractionDigits(2);

        if(downloadSpeed>1024*1024){
            downloadSpeed/=(1024*1024);
            downSpeed=df.format(downloadSpeed)+"MB/s";
        }else if(downloadSpeed>1024){
            downloadSpeed/=(1024);
            downSpeed=df.format(downloadSpeed)+"KB/s";
        }else{
            downSpeed=df.format(downloadSpeed)+"B/s";
        }

        if(uploadSpeed>1024*1024){
            uploadSpeed/=(1024*1024);
            upSpeed=df.format(uploadSpeed)+"MB/s";
        }else if(uploadSpeed>1024){
            uploadSpeed/=(1024);
            upSpeed=df.format(uploadSpeed)+"KB/s";
        }else{
            upSpeed=df.format(uploadSpeed)+"B/s";
        }

        updateSpeed("↓ "+downSpeed,"↑ "+upSpeed);
    }

    public WindowUtil(Context context) {
        this.context = context;
        windowManager= (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
        speedView=new SpeedView(context);
        params=new WindowManager.LayoutParams();
        params=new WindowManager.LayoutParams();
        params.x=initX;
        params.y=initY;
        params.width=params.height=WindowManager.LayoutParams.WRAP_CONTENT;
        params.type=WindowManager.LayoutParams.TYPE_PHONE;
        params.gravity= Gravity.LEFT|Gravity.TOP;
        params.format= PixelFormat.RGBA_8888;
        params.flags=WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE| WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL;
                //设置悬浮窗可以拖拽至状态栏的位置
//        | WindowManager.LayoutParams.FLAG_FULLSCREEN| WindowManager.LayoutParams.FLAG_LAYOUT_IN_SCREEN;

    }

    public void showSpeedView(){
        windowManager.addView(speedView,params);
        isShowing=true;
        preRxBytes= TrafficStats.getTotalRxBytes();
        preSeBytes=TrafficStats.getTotalTxBytes()-preRxBytes;
        handler.sendEmptyMessage(0);
    }

    public void closeSpeedView(){
        windowManager.removeView(speedView);
        isShowing=false;
    }

    public void updateSpeed(String downSpeed,String upSpeed){
        speedView.upText.setText(upSpeed);
        speedView.downText.setText(downSpeed);
    }
}